ペロブスカイト太陽電池の不安定性を改善、理論限界への設計指針を発見 -新型太陽電池のポテンシャルを見極める-. 京都大学プレスリリース. 2015-12-08.Article first published online: 7 DEC 2015Perovskite solar cells exhibit improved photovoltaic parameters with increasing perovskite grain size. The larger photocurrent is due to the enhanced absorption efficiency for thicker perovskite layers. The larger open-circuit voltage (VOC ) is ascribed to the reduced trap-assisted recombination for the larger grains. As a result, the power conversion efficiency exceeds 19% at best. Further improvement in VOC would be possible if the trap density were reduced.

This is the peer reviewed version of the following article: [Kim, H. D., Ohkita, H., Benten, H. and Ito, S. (2015), Photovoltaic Performance of Perovskite Solar Cells with Different Grain Sizes. Advanced Materials, Early View], which has been published in final form at http://dx.doi.org/10.1002/adma.201504144. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.